WorksheetsUnit 3, Topic 3 - Concept Check (History of Atomic Theory)
Total questions: 11
Worksheet time: 6mins
Mass before = Mass after
Law of Conservation of Mass
Law of Definite Proportions
Law of Multiple Proportions
If one atom of Carbon weighs 12.01 amu, how much will 4 atoms of Carbon weigh?
4 amu
48.04 amu
12.01 amu
Derived from the Greek language, the word atom means....
invisible
indivisible
miniscule
CALCULATION!
If a 50.0 gram sample of a compound contains 10.0 grams of Carbon, what percentage of Carbon is in the compound?
20.0 %
2.0 %
0.2 %
Which subatomic particle was discovered first?
proton
neutron
electron
Compounds are made from a FIXED ratio of elements.
Law of Conservation of Mass
Law of Definite Proportions
Law of Multiple Proportions
Atoms combine to form compounds in WHOLE NUMBER ratios.
Law of Conservation of Mass
Law of Definite Proportions
Law of Multiple Proportions
5 g + 3 g → 2 g + ?
6 g
10 g
4 g
Whose model of the atom was the first to include a nucleus?
Dalton
Thomson
Rutherford
Whose model of the atom showed that electrons exist in specific energy levels?
Thomson
Bohr
Chadwick
Whose model of the atom shows electrons spread out in a sea of positive charge?
Thomson
Schrodinger
Rutherford
